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Document and Entity Information - shares shares in Millions	3 Months Ended
Document and Entity Information - shares shares in Millions	May 05, 2018	May 29, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	May 05, 2018
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Trading Symbol	MRVL
Entity Registrant Name	MARVELL TECHNOLOGY GROUP LTD
Entity Central Index Key	0001058057
Current Fiscal Year End Date	--02-02
Entity File Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		499.9

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	May 05, 2018	Feb. 03, 2018
Current assets:
Cash and cash equivalents	$ 1,167,258	$ 888,482
Short-term investments	712,053	952,790
Accounts receivable, net	329,650	280,395
Inventories	169,556	170,039
Prepaid expenses and other current assets	38,868	41,482
Assets held for sale	30,707	30,767
Total current assets	2,448,092	2,363,955
Property and equipment, net	213,656	202,222
Goodwill	1,993,310	1,993,310
Other non-current assets	209,261	148,800
Total assets	4,864,319	4,708,287
Current liabilities:
Accounts payable	157,043	145,236
Accrued liabilities	180,117	86,958
Accrued employee compensation	105,601	127,711
Deferred income	1,880	61,237
Total current liabilities	444,641	421,142
Non-current income taxes payable	56,606	56,976
Other non-current liabilities	77,561	88,756
Total liabilities	578,808	566,874
Commitments and contingencies (Note 8)
Shareholders’ equity:
Common shares, $0.002 par value	1,000	991
Additional paid-in capital	2,744,478	2,733,292
Accumulated other comprehensive loss	(2,404)	(2,322)
Retained earnings	1,542,437	1,409,452
Total shareholders’ equity	4,285,511	4,141,413
Total liabilities and shareholders’ equity	$ 4,864,319	$ 4,708,287

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	May 05, 2018	Feb. 03, 2018
Statement of Financial Position [Abstract]
Common shares, par value (in usd per share)	$ 0.002	$ 0.002

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	May 05, 2018	Apr. 29, 2017
Income Statement [Abstract]
Net revenue	$ 604,631	$ 572,709
Cost of goods sold	228,938	227,198
Gross profit	375,693	345,511
Operating expenses:
Research and development	176,734	188,096
Selling, general and administrative	72,313	55,104
Restructuring related charges	1,567	886
Total operating expenses	250,614	244,086
Operating income from continuing operations	125,079	101,425
Interest and other income, net	7,296	3,333
Income from continuing operations before income taxes	132,375	104,758
Provision for income taxes	3,763	5,166
Income from continuing operations, net of tax	128,612	99,592
Income from discontinued operations, net of tax	0	7,029
Net income	$ 128,612	$ 106,621
Net income per share - Basic:
Continuing operations (in usd per share)	$ 0.26	$ 0.20
Discontinued operations (in usd per share)	0.00	0.01
Net income per share - Basic (in usd per share)	0.26	0.21
Net income per share - Diluted:
Continuing operations (in usd per share)	0.25	0.20
Discontinued operations (in usd per share)	0.00	0.01
Net income per share - Diluted (in usd per share)	$ 0.25	$ 0.21
Weighted average shares:
Basic (in shares)	497,335	503,790
Diluted (in shares)	508,716	517,592
Cash dividends declared per share (in usd per share)	$ 0.06	$ 0.06

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	May 05, 2018	Apr. 29, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 128,612	$ 106,621
Other comprehensive loss, net of tax:
Net change in unrealized loss on marketable securities	(82)	(673)
Net change in unrealized gain on cash flow hedges	0	1,758
Net change in pension liability	0	(1,272)
Other comprehensive loss, net of tax	(82)	(187)
Comprehensive income, net of tax	$ 128,530	$ 106,434

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	May 05, 2018	Apr. 29, 2017
Cash flows from operating activities:
Net income	$ 128,612	$ 106,621
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	20,343	20,742
Share-based compensation	23,852	24,017
Amortization and write-off of acquired intangible assets	0	1,071
Restructuring related impairment charges (gain)	0	(516)
Gain from investment in privately-held company	(1,100)	0
Amortization of premium/discount on available-for-sale securities	1,161	206
Other non-cash expense (income), net	813	(25)
Deferred income taxes	824	783
Loss on sale of property and equipment	17	58
Gain on sale of discontinued operations	0	(8,155)
Changes in assets and liabilities:
Accounts receivable	(47,393)	(21,763)
Inventories	2,680	(11,542)
Prepaid expenses and other assets	(14,108)	5,394
Accounts payable	14,744	31,423
Accrued liabilities and other non-current liabilities	21,236	(11,625)
Accrued employee compensation	(22,110)	(7,529)
Deferred income	(797)	5,016
Net cash provided by operating activities	128,774	134,176
Cash flows from investing activities:
Purchases of available-for-sale securities	(13,457)	(198,416)
Sales of available-for-sale securities	70,273	78,764
Maturities of available-for-sale securities	128,820	82,235
Purchases of time deposits	(25,000)	(75,000)
Maturities of time deposits	75,000	75,000
Purchases of technology licenses	(360)	(1,093)
Purchases of property and equipment	(13,588)	(9,741)
Proceeds from sales of property and equipment	11	685
Net proceeds from sale of discontinued operations	0	22,954
Other	(5,000)	7,275
Net cash provided by (used in) investing activities	216,699	(17,337)
Cash flows from financing activities:
Repurchases of common stock	0	(166,293)
Proceeds from employee stock plans	11,055	19,939
Minimum tax withholding paid on behalf of employees for net share settlement	(23,893)	(21,809)
Dividend payments to shareholders	(29,798)	(29,991)
Payments on technology license obligations	(20,461)	(6,815)
Payment of equity and debt financing costs	(3,600)	0
Net cash used in financing activities	(66,697)	(204,969)
Net increase (decrease) in cash and cash equivalents	278,776	(88,130)
Cash and cash equivalents at beginning of period	888,482	814,092
Cash and cash equivalents at end of period	$ 1,167,258	$ 725,962

Basis of Presentation	3 Months Ended
Basis of Presentation	May 05, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The unaudited condensed consolidated financial statements of Marvell Technology Group Ltd., a Bermuda exempted company, and its wholly owned subsidiaries (the “Company”), as of and for the three months ended May 5, 2018, have been prepared as required by the U.S. Securities and Exchange Commission (the “SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) have been condensed or omitted as permitted by the SEC. These unaudited condensed consolidated financial statements and related notes should be read in conjunction with the Company's fiscal year 2018 audited financial statements included in the Company's Annual Report on Form 10-K for the fiscal year ended February 3, 2018. In the opinion of management, the financial statements include all adjustments, including normal recurring adjustments and other adjustments, that are considered necessary for fair presentation of the Company’s financial position and results of operations. All inter-company accounts and transactions have been eliminated. Operating results for the periods presented herein are not necessarily indicative of the results that may be expected for the entire year. The Company's financial results for prior periods presented herein have been recast to reflect certain businesses that were classified as discontinued operations during the fourth quarter of fiscal year 2017 and second quarter of fiscal year 2018. Certain prior year amounts have been reclassified to conform to current year presentation. These amounts were not material to any of the periods presented. The Company’s fiscal year is the 52- or 53-week period ending on the Saturday closest to January 31. Accordingly, every fifth or sixth fiscal year will have a 53-week period. The additional week in a 53-week year is added to the fourth quarter, making such quarter consist of 14 weeks. Fiscal 2018 had a 53-week year. Fiscal 2019 is a 52-week year. On November 19, 2017, the Company entered into an agreement and plan of merger (the “Merger Agreement”) with Cavium, Inc. (“Cavium”), pursuant to which a subsidiary of the Company will merge with and into Cavium, with Cavium surviving and becoming a wholly-owned indirect subsidiary of the Company (the "Merger"). Cavium is a provider of highly integrated semiconductor processors that enable intelligent processing for wired and wireless infrastructure and cloud for networking, communications, storage and security applications. The Merger is primarily intended to create an opportunity for the combined company to emerge as a leader in infrastructure solutions. Pursuant to the Merger Agreement, the Company will issue 2.1757 common shares and pay $40.00 per share in cash, without interest, for each share of Cavium common stock. The exchange ratio was based on a purchase price of $80 per share, using the Company's undisturbed price prior to November 3, when media reports of the transaction first surfaced. This represents a transaction value of approximately $6 billion. The merger consideration will be financed by a mix of cash, new debt financing and issuance of the Company's common stock. The Company intends to fund the cash consideration with a combination of cash on hand from the combined companies and $1.75 billion in debt financing. The Company has obtained commitments consisting of an $850 million bridge loan commitment and a $900 million committed term loan from Goldman Sachs Bank USA and Bank of America Merrill Lynch, in each case subject to customary terms and conditions. In addition, in connection with the Merger, the Company plans to obtain a $500 million revolving credit facility, borrowings under which will be used for general corporate purposes of the Company and its subsidiaries. The transaction is not subject to any financing condition. The Company has recorded $20.1 million of associated deferred debt and equity financing costs on the accompanying consolidated balance sheet as of May 5, 2018. The transaction is expected to close in mid-calendar 2018, subject to customary closing conditions, including receipt of regulatory approvals from China's State Administration for Market Regulation (formerly handled by China's MOFCOM Anti-Monopoly Bureau). The transaction has already satisfied the following closing conditions: (i) receipt of the required approval by Cavium shareholders, which was obtained on March 16, 2018; (ii) the expiration of the waiting period applicable to the consummation of the Merger under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, which expired on January 26, 2018, and (iii) the receipt of Committee on Foreign Investment in the U.S. ("CFIUS") approval, which was obtained on May 24, 2018. In certain circumstances, a termination fee of up to $180 million may be payable by the Company or Cavium upon termination of the transaction, as more fully described in the Merger Agreement.

Recent Accounting Pronouncements	3 Months Ended
Recent Accounting Pronouncements	May 05, 2018
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements Accounting Pronouncements Recently Adopted In May 2014, the FASB issued a new accounting standard on the recognition of revenue from contracts with customers that superseded nearly all existing revenue recognition guidance under GAAP. The new standard requires an entity to recognize revenue from the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance addresses, in particular, contracts with more than one performance obligation, as well as the accounting for certain costs to obtain or fulfill a contract with a customer, and provides for additional disclosures with respect to revenue and cash flows arising from contracts with customers. Public entities are required to apply the amendments on either a full or modified retrospective basis for annual periods beginning after December 15, 2017 and for interim periods within those annual periods. The Company adopted the standard on a modified retrospective basis in the first quarter of fiscal year 2019, with the cumulative effect recognized in retained earnings at the date of adoption. See "Note 3 - Revenue" for additional information on the impact of the adoption of the new standard on the Company’s consolidated financial statements. In January 2016, the FASB issued an accounting standard update that changes the accounting for equity investments, financial liabilities under the fair value option, and the presentation and disclosure requirements for financial instruments. The Company adopted the standard in the first quarter of fiscal 2019. The adoption of this guidance did not have a significant impact on the Company's consolidated financial statements. In August 2016, the FASB issued an accounting standards update to add or clarify guidance on the classification of certain cash receipts and cash payments in the statement of cash flows. The amendments in the update provide guidance on eight specific cash flow issues. The amendments to the guidance should be applied using a retrospective transition method for each period presented and, if it is impracticable to apply all of the amendments retrospectively for some of the issues, the amendments for those issues would be applied prospectively as of the earliest date practicable. The Company adopted the standard in the first quarter of fiscal 2019. The adoption of this guidance did not have an impact on the Company's consolidated financial statements. In October 2016, the FASB issued new guidance that simplifies the accounting for the income tax effects of intra-entity transfers and will require companies to recognize the income tax effects of intra-entity transfers of assets other than inventory when the transfer occurs. Previous guidance required companies to defer the income tax effects of intra-entity transfers of assets until the asset had been sold to an outside party or otherwise recognized. The Company adopted the standard in the first quarter of fiscal 2019. The adoption of this guidance did not have an impact on the Company's consolidated financial statements. In November 2016, the FASB issued new guidance that requires entities to include in their cash and cash-equivalent balances in the statement of cash flows those amounts that are deemed to be restricted cash and restricted cash equivalents. As a result, companies will no longer present transfers between cash and cash equivalents and restricted cash and restricted cash equivalents in the statement of cash flows. The Company adopted the standard in the first quarter of fiscal 2019. The adoption of this guidance did not have a significant impact on the Company's consolidated financial statements. In January 2017, the FASB issued an accounting standards update that revises the definition of a business. The amendments provide a more robust framework for determining when a set of assets and activities is a business. The update is intended to help companies evaluate whether transactions should be accounted for as acquisitions or disposals of assets or businesses. The Company adopted the standard in the first quarter of fiscal 2019. The adoption of this guidance did not have an impact on the Company's consolidated financial statements. In May 2017, the FASB issued an accounting standards update that provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting. Unless the changes in terms or conditions meet all three criteria outlined in the guidance, modification accounting should be applied. The three criteria relate to changes in the terms and conditions that affect the fair value, vesting conditions, or classification of a share-based payment award. The guidance is required to be applied prospectively to an award modified on or after the adoption date. The Company adopted the standard in the first quarter of fiscal 2019. The adoption of this guidance did not have an impact on the Company's consolidated financial statements. Accounting Pronouncements Not Yet Effective In February 2016, the FASB issued a new standard on the accounting for leases, which requires a lessee to record a right-of-use asset and a corresponding lease liability on the balance sheet for all leases with terms longer than twelve months. The standard also expands the required quantitative and qualitative disclosures for lease arrangements. The standard is effective for the Company beginning in the first quarter of fiscal year 2020. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements. In June 2016, the FASB issued a new standard requiring financial assets measured at amortized cost be presented at the net amount expected to be collected, through an allowance for credit losses that is deducted from the amortized cost basis. The standard eliminates the threshold for initial recognition in current GAAP and reflects an entity’s current estimate of all expected credit losses. The measurement of expected credit losses is based on historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the financial assets. The standard is effective for the Company beginning in the first quarter of fiscal year 2021. The Company does not expect the adoption of this guidance will have a material effect on its consolidated financial statements. In August 2017, the FASB issued an accounting standards update that simplifies the application and administration of hedge accounting. The guidance amends the presentation and disclosure requirements and changes how companies assess effectiveness. The guidance is intended to more closely align hedge accounting with companies' risk management strategies, simplify the application of hedge accounting, and increase transparency as to the scope and results of hedging programs. The guidance is effective for the Company beginning in the first quarter of fiscal year 2021. Early adoption is permitted. The guidance will be applied to cash flow and net investment hedge relationships that exist on the date of adoption using a modified retrospective approach. The presentation and disclosure requirements will be applied prospectively. The Company is evaluating the effect this new guidance will have on its consolidated financial statements.

Revenue

3 Months Ended

May 05, 2018

Revenue from Contract with Customer [Abstract]

Revenue

Impacts from the Adoption of the New Revenue Standard

At the beginning of fiscal year 2019, the Company adopted the new revenue recognition standard on a modified retrospective basis, with the cumulative effect recognized in retained earnings at the date of adoption. The Company elected to apply the new revenue standard retrospectively to all contracts that are not completed contracts at the date of the initial adoption. Based on the Company’s assessment of this new accounting standard, a change in revenue recognition timing on its component sales made to distributors was made in the first quarter of fiscal year 2019 and the Company started to recognize revenue when the Company transfers control to the distributor rather than deferring recognition until the distributor sells the components. In addition, the Company established accruals for the variable consideration aspect of sales, estimated based on historical experience, which include estimates for price discounts, price protection, rebates, returns and stock rotation programs. On the date of initial adoption, the Company removed the deferred income on component sales made to distributors and recorded estimates of the accruals for variable consideration through a cumulative adjustment to retained earnings. The net impact to the opening balance of retained earnings related to the adoption of the new standard was an increase of $34.2 million.

The following tables summarize financial statement line items that are affected in the current reporting period by the application of the new revenue recognition policy as compared with the previous revenue recognition policy which was in effect in prior periods in accordance with ASC 605, Revenue Recognition:



	May 5, 2018
(In thousands)	As currently reported		Adjustments			Balances without adoption of new revenue standard
Consolidated balance sheet:
Assets
Accounts receivable, net	$	329,650	$	(5,837	)	$	323,813
Inventory	169,556		(2,486		)	167,070
Other non-current assets	209,261		(58,717		)	150,544
Liabilities and shareholders' equity:
Accrued liabilities	180,117		(97,983		)	82,134
Deferred income	1,880		77,368			79,248
Retained earnings	$	1,542,437	$	(46,425	)	$	1,496,012



	Three Months Ended May 5, 2018
(In thousands, except per share amounts)	As currently reported		Adjustments			Balances without adoption of new revenue standard
Consolidated statement of operation:
Net revenue	$	604,631	$	(15,529	)	$	589,102
Cost of goods sold	228,938		(3,396		)	225,542
Net income (loss)	128,612		(12,133		)	116,479
Net income (loss) per share - Basic	0.26		(0.03		)	0.23
Net income (loss) per share - Diluted	$	0.25	$	(0.02	)	$	0.23

Adoption of the new revenue standard had no impact to cash from or used in operating, financing, or investing activities on the condensed consolidated statements of cash flow.

New Revenue Recognition Policy Including Significant Judgments and Estimates

Through the fiscal year ended February 3, 2018, in accordance with ASC 605, Revenue Recognition, the Company recognized revenue when there was persuasive evidence of an arrangement, delivery had occurred, the fee was fixed or determinable, and collection was reasonably assured. If the Company granted extended payment terms greater than its standard terms for a customer such that collectability was not assured, the revenue was deferred upon shipment and would be recognized when the payment became due provided all other revenue recognition criteria had been satisfied.

Product revenue was generally recognized upon shipment of product to customers, net of accruals for estimated sales returns and rebates. However, some of the Company’s sales were made through distributors under agreements allowing for price protection and limited rights of stock rotation on products unsold by the distributors. Product revenue on sales made through distributors were deferred until the distributors sold the product to end customers. Deferred revenue less the related cost of the inventories was reported as deferred income. The Company did not believe that there was any significant exposure related to impairment of deferred cost of sales, as its historical returns had been minimal and inventory turnover for its distributors generally ranged from 60 to 90 days. The Company’s sales to direct customers were made primarily pursuant to standard purchase orders for delivery of products.

As a result of the adoption of the new revenue standard on February 4, 2018, at the beginning of the first quarter of fiscal year 2019, the Company revised its revenue recognition policy. The Company now recognizes revenue upon transfer of control of promised products or services to customers in an amount that reflects the consideration the Company expects to receive in exchange for those products or services. Under the new revenue recognition standard, the Company applies the following five step approach: (1) identify the contract with a customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the performance obligations in the contract, and (5) recognize revenue when a performance obligation is satisfied.

The Company enters into contracts that may include various combinations of products and services that are capable of being distinct and accounted for as separate performance obligations. To date, the majority of the revenue has been generated by sales associated with storage, networking and connectivity products. Revenue from services has been insignificant. Performance obligations associated with product sales transactions are generally satisfied when control passes to customers upon shipment. Accordingly, product revenue is recognized at a point in time when control of the asset is transferred to the customer. The Company recognizes revenue when it satisfies a performance obligation by transferring control of a product to a customer in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. For product revenue, the performance obligation is deemed to be the delivery of the product and therefore, the revenue is generally recognized upon shipment to customers, net of accruals for estimated sales returns and rebates. These estimates are based on historical returns, analysis of credit memo data and other known factors. Actual returns could differ from these estimates. The Company accounts for rebates by recording reductions to revenue for rebates in the same period that the related revenue is recorded. The amount of these reductions is based upon the terms agreed to with the customer. Some of the Company’s sales are made to distributors under agreements allowing for price protection, price discounts and limited rights of stock rotation on products unsold by the distributors. Control passes to the distributor upon shipment, and terms and payment by the Company’s distributors is not contingent on resale of the product. Product revenue on sales made to distributors with price protection and stock rotation rights is recognized upon shipment to distributors, with an accrual for the variable consideration aspect of sales to distributors, estimated based on historical experience, including estimates for price discounts, price protection, rebates, and stock rotation programs.

The Company’s products are generally subject to warranty, which provides for the estimated future costs of replacement upon shipment of the product. The Company’s products carry a standard one-year warranty, with certain exceptions in which the warranty period can extend to more than one year based on contractual agreements. The warranty accrual is estimated primarily based on historical claims compared to historical revenues and assumes that the Company will have to replace products subject to a claim. From time to time, the Company becomes aware of specific warranty situations, and it records specific accruals to cover these exposures. Warranty expenses were not material for the periods presented.

Disaggregation of Revenue

The majority of the Company's revenue is generated from sales of the Company’s products.

The following table summarizes net revenue disaggregated by product group (in thousands, except percentages):



	Three Months Ended
		May 5, 2018		% of Total
Net revenue by product group:
Storage (1)		$	317,069	52	%
Networking (2)		153,734		26	%
Connectivity (3)		90,494		15	%
Other (4)		43,334		7	%
		$	604,631


1)	Storage products are comprised primarily of HDD, SSD Controllers and Data Center Storage Solutions.


2)	Networking products are comprised primarily of Ethernet Switches, Ethernet Transceivers, Embedded ARM Processors and Automotive Ethernet, as well as a few legacy product lines in which the Company no longer invests, but will generate revenue for several years.


3)	Connectivity products are comprised primarily of Wi-Fi solutions including Wi-Fi only, Wi-Fi/Bluetooth combos and Wi-Fi Microcontroller combos.


4)	Other products comprised of printer specific standard SoC products, as well as full-custom, application-specific integrated circuits and application processors.

The following table summarizes net revenue disaggregated by primary geographical market (in thousands, except percentages):



	Three Months Ended
		May 5, 2018		% of Total
Net revenue based on destination of shipment:
China		$	276,622	46	%
Malaysia		90,623		15	%
Philippines		57,767		9	%
Thailand		41,534		7	%
United States		16,030		3	%
Other		122,055		20	%
		$	604,631

The following table summarizes net revenue disaggregated by customer type (in thousands, except percentages):



	Three Months Ended
		May 5, 2018		% of Total
Net revenue by customer type:
Direct customers		$	470,476	78	%
Distributors		134,155		22	%
		$	604,631

Contract Liabilities

Contract liabilities consist of the Company’s obligation to transfer goods or services to a customer for which the Company has received consideration or the amount is due from the customer. As of May 5, 2018, contract liability balances are comprised of variable consideration estimated based on a portfolio basis using the expected value methodology based on analysis of historical data, current economic conditions, and contractual terms. Variable consideration estimates consist of the estimated returns, price discounts, price protection, rebates, and stock rotation programs and deferred income for the prepayments made by the customers. As of the end of a reporting period, some of the performance obligations associated with contracts will have been unsatisfied or only partially satisfied. In accordance with the practical expedients available in the guidance, the Company does not disclose the value of unsatisfied performance obligations for contracts with an original expected duration of one year or less. Contract liabilities are included in accrued liabilities in the condensed consolidated balance sheets.

The opening balance of contract liabilities at the beginning of the first quarter of fiscal year 2019 was $79.6 million. During the three months ended May 5, 2018, contract liabilities increased by $198.8 million associated with variable consideration estimates for additional shipments in the quarter, offset by $173.4 million decrease in such reserves primarily due to credit memos issued to customers. The ending balance of contract liabilities as of the first quarter ended in fiscal year 2019 was $105.0 million.

Sales Commissions

Sales commissions are generally earned by the salespersons based on shipments to customers. The Company expenses these costs when incurred because the Company's sales commissions do not directly relate to any individual contract. These costs are recorded within selling and marketing expenses.

Supplemental Financial Information

3 Months Ended

May 05, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Supplemental Financial Information

Supplemental Financial Information (in thousands)

Consolidated Balance Sheets



	May 5, 2018		February 3, 2018
Inventories:
Work-in-process	$	104,792	$	103,711
Finished goods	64,764		66,328
Total inventories	$	169,556	$	170,039

Inventory held by third-party logistics providers is recorded as consigned inventory on the Company’s unaudited condensed consolidated balance sheet. The amount of inventory held at third-party logistics providers was $16.3 million and $18.7 million at May 5, 2018 and February 3, 2018, respectively.



	May 5, 2018			February 3, 2018
Property and equipment, net:
Machinery and equipment	$	550,785		$	535,416
Land, buildings, and leasehold improvements	251,555			247,675
Computer software	98,477			98,253
Furniture and fixtures	21,134			21,139
	921,951			902,483
Less: Accumulated depreciation and amortization	(708,295		)	(700,261		)
Total property and equipment, net	$	213,656		$	202,222

Current accrued liabilities are comprised of the following at May 5, 2018 and February 3, 2018, respectively:



	May 5, 2018		February 3, 2018
Accrued liabilities:
Contract liabilities	$	104,988	$	—
Technology license obligations	33,167		28,488
Accrued royalties	13,028		11,860
Accrued rebates (1)	—		9,292
Accrued legal related expenses	9,354		13,050
Unsettled investment trades (2)	1,499		4,497
Other	18,081		19,771
Total accrued liabilities	$	180,117	$	86,958

(1) Accrued rebates are classified as part of contract liabilities beginning in fiscal year 2019 upon adoption of the new revenue recognition standard.

(2) Unsettled investment trades represent amounts owed to third parties for investment purchases for which cash settlement has not yet occurred.



	May 5, 2018			February 3, 2018
Deferred income:
Deferred revenue	$	2,407		$	81,896
Deferred cost of goods sold	(527		)	(20,659		)
Deferred income	$	1,880		$	61,237



	May 5, 2018		February 3, 2018
Other non-current liabilities:
Deferred tax liabilities	$	52,292	$	52,204
Technology license obligations	20,789		34,060
Other	4,480		2,492
Other non-current liabilities	$	77,561	$	88,756

Accumulated Other Comprehensive Income (Loss)

The changes in accumulated other comprehensive income (loss) by components are presented in the following tables:



	Unrealized Gain (Loss) on Marketable Securities (1)
Balance at February 3, 2018	$	(2,322	)
Other comprehensive loss before reclassifications	(733		)
Amounts reclassified from accumulated other comprehensive loss	651
Net current-period other comprehensive loss, net of tax	(82		)
Balance at May 5, 2018	$	(2,404	)



	Unrealized Gain (Loss) on Marketable Securities (1)			Unrealized Gain (Loss) on Cash Flow Hedges (2)			Net Change in Pension Liability			Total
Balance at January 28, 2017	$	(801	)	$	824		$	—		$	23
Other comprehensive income (loss) before reclassifications	(714		)	1,838			(1,272		)	(148		)
Amounts reclassified from accumulated other comprehensive income (loss)	41			(80		)	—			(39		)
Net current-period other comprehensive income (loss), net of tax	(673		)	1,758			(1,272		)	(187		)
Balance at April 29, 2017	$	(1,474	)	$	2,582		$	(1,272	)	$	(164	)

(1) The amounts of gains (losses) associated with the Company's marketable securities reclassified from accumulated other comprehensive income (loss) are recorded in interest and other income, net.

(2) The amounts of gains (losses) associated with the Company's derivative financial instruments reclassified from accumulated other comprehensive income (loss) are recorded in operating expenses. See "Note 6- Derivative Financial Instruments" for additional information on the affected line items in the condensed consolidated statements of operations.

Consolidated Statements of Operations



	Three Months Ended
	May 5, 2018			April 29, 2017
Interest and other income, net:
Interest income	$	6,069		$	3,512
Net realized gain (loss) on investments	(860		)	25
Currency remeasurement loss	(522		)	(90		)
Other income (loss)	2,853			(63		)
Interest expense	(244		)	(51		)
	$	7,296		$	3,333

Investments

3 Months Ended

May 05, 2018

Investments, Debt and Equity Securities [Abstract]

Investments

The following tables summarize the Company’s investments (in thousands):



	May 5, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Short-term investments:
Available-for-sale:
U.S. government and agency debt	$	194,192	$	32	$	(521	)	$	193,703
Foreign government and agency debt	1,810		—		(14		)	1,796
Municipal debt securities	1,315		—		(1		)	1,314
Corporate debt securities	388,194		446		(2,158		)	386,482
Asset backed securities	28,954		—		(196		)	28,758
Held-to-maturity:
Time deposits	100,000		—		—			100,000
Total short-term investments	714,465		478		(2,890		)	712,053
Total investments	$	714,465	$	478	$	(2,890	)	$	712,053



	February 3, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Short-term investments:
Available-for-sale:
U.S. government and agency debt	$	248,336	$	49	$	(644	)	$	247,741
Foreign government and agency debt	7,004		—		(17		)	6,987
Municipal debt securities	2,734		—		(6		)	2,728
Corporate debt securities	504,609		469		(1,999		)	503,079
Asset backed securities	42,429		3		(177		)	42,255
Held-to-maturity:
Time deposits	150,000		—		—			150,000
Total short-term investments	955,112		521		(2,843		)	952,790
Total investments	$	955,112	$	521	$	(2,843	)	$	952,790

Short-term, highly liquid investments of $392.1 million and $267.6 million as of May 5, 2018 and February 3, 2018, respectively, included in cash and cash equivalents on the accompanying consolidated balance sheets, are not included in the tables above because the gross unrealized gains and losses were immaterial as the carrying values approximate fair value due to the short term maturity of such investments.

Gross realized gains and gross realized losses on sales of available-for-sale securities are presented in the following tables (in thousands):



	Three Months Ended
	May 5, 2018			April 29, 2017
Gross realized gains	$	2		$	69
Gross realized losses	(862		)	(44		)
Total net realized gains (losses)	$	(860	)	$	25

The contractual maturities of available-for-sale securities are presented in the following tables (in thousands):



	May 5, 2018				February 3, 2018
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Due in one year or less	$	445,026	$	444,314	$	554,247	$	553,866
Due between one and five years	269,439		267,740		400,866		398,924
Due over five years	—		—		—		—
	$	714,465	$	712,054	$	955,113	$	952,790

For individual securities that have been in a continuous unrealized loss position, the fair value and gross unrealized loss for these securities, aggregated by investment category and length of time in an unrealized position, are presented in the following tables (in thousands):



	May 5, 2018
	Less than 12 months					12 months or more					Total
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
U.S. government and agency debt	$	123,181	$	(219	)	$	45,137	$	(302	)	$	168,318	$	(521	)
Foreign government and agency debt	—		—			1,796		(13		)	1,796		(13		)
Municipal debt securities	1,314		(1		)	—		—			1,314		(1		)
Corporate debt securities	195,971		(1,660		)	39,594		(498		)	235,565		(2,158		)
Asset backed securities	26,146		(158		)	2,161		(39		)	28,307		(197		)
Total securities	$	346,612	$	(2,038	)	$	88,688	$	(852	)	$	435,300	$	(2,890	)


	February 3, 2018
	Less than 12 months					12 months or more					Total
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
U.S. government and agency debt	$	148,538	$	(298	)	$	51,332	$	(346	)	$	199,870	$	(644	)
Foreign government and agency debt	3,993		(1		)	2,994		(16		)	6,987		(17		)
Municipal debt securities	1,969		(6		)	—		—			1,969		(6		)
Corporate debt securities	253,380		(1,514		)	46,805		(485		)	300,185		(1,999		)
Asset backed securities	37,636		(145		)	2,167		(32		)	39,803		(177		)
Total securities	$	445,516	$	(1,964	)	$	103,298	$	(879	)	$	548,814	$	(2,843	)

As of May 5, 2018, for fixed income securities that were in unrealized loss positions, the Company has determined that (i) it does not have the intent to sell these investments, and (ii) it is not more likely than not that it will be required to sell any of these investments before recovery of the amortized cost basis. In addition, as of May 5, 2018, the Company anticipates that it will recover the amortized cost basis of such fixed income securities and has determined that no other-than-temporary impairments associated with credit losses were required to be recognized during the three months ended May 5, 2018.

Derivative Financial Instruments

3 Months Ended

May 05, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

The Company manages some of its foreign currency exchange rate risk through the purchase of foreign currency exchange contracts that hedge against the short-term effect of currency fluctuations. The Company’s policy is to enter into foreign currency forward contracts with maturities less than 12 months which mitigates the effect of rate fluctuations on certain local currency denominated operating expenses. All derivative instruments are recorded at fair value in either prepaid expenses and other current assets or accrued liabilities. The Company reports cash flows from derivative instruments in cash flows from operating activities. The Company uses quoted prices to value its derivative instruments. There were no outstanding forward contracts at May 5, 2018 and February 3, 2018.

Cash Flow Hedges. The Company designates and documents its foreign currency forward exchange contracts as cash flow hedges for certain operating expenses. The Company evaluates and calculates the effectiveness of each hedge at least quarterly. The effective change is recorded in accumulated other comprehensive income and is subsequently reclassified to operating expense when the hedged expense is recognized. Ineffectiveness is recorded in interest and other income, net.

The following table provides information about gains (losses) associated with the Company’s derivative financial instruments (in thousands):



		Amount of Gains (Losses) in Statements of Operations
		Three Months Ended
	Location of Gains (Losses) in Statements of Operations	May 5, 2018		April 29, 2017
Derivatives designated as cash flow hedges:
Forward contracts:	Research and development	$	—	$	475
	Selling, general and administrative	—		63
		$	—	$	538

The amounts of gains (losses) associated with the Company's derivative financial instruments reclassified from accumulated other comprehensive loss are presented in the following table (in thousands):



	Three Months Ended
Affected Line Item in the Statements of Operations:	May 5, 2018		April 29, 2017
Operating costs and expenses:
Cash flow hedges:
Research and development	$	—	$	71
Selling, general and administrative	—		9
Total	$	—	$	80

The portion of gains (losses) excluded from the assessment of hedge effectiveness is included in interest and other income, net. These amounts were not material in the three months ended April 29, 2017. The Company did not have hedge ineffectiveness from derivative financial instruments in the three months ended April 29, 2017. No cash flow hedges were terminated as a result of forecasted transactions that did not occur.

Fair Value Measurements

3 Months Ended

May 05, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair value is an exit price representing the amount that would be received in the sale of an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or a liability. As a basis for considering such assumptions, the accounting guidance establishes a three-tier value hierarchy, which prioritizes the inputs used in the valuation methodologies in measuring fair value:

Level 1—Observable inputs that reflect quoted prices for identical assets or liabilities in active markets.

Level 2—Other inputs that are directly or indirectly observable in the marketplace.

Level 3—Unobservable inputs that are supported by little or no market activity.

The fair value hierarchy also requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value.

The Company’s Level 1 assets include institutional money-market funds that are classified as cash equivalents and marketable investments in U.S. government and agency debt, which are valued primarily using quoted market prices. The Company’s Level 2 assets include its marketable investments in time deposits, foreign government and agency debt, municipal debt securities, corporate debt securities and asset backed securities as the market inputs used to value these instruments consist of market yields, reported trades and broker/dealer quotes, which are corroborated with observable market data. In addition, the severance pay fund is classified as Level 2 assets as the valuation inputs are based on quoted prices and market observable data of similar instruments.

The tables below set forth, by level, the Company’s assets and liabilities that are measured at fair value on a recurring basis. The tables do not include assets and liabilities that are measured at historical cost or any basis other than fair value (in thousands):



	Fair Value Measurements at May 5, 2018
	Level 1		Level 2		Level 3		Total
Items measured at fair value on a recurring basis:
Assets
Cash equivalents:
Money market funds	$	93,108	$	—	$	—	$	93,108
Time deposits	—		9,385		—		9,385
U.S. government and agency debt	248,901		—		—		248,901
Municipal debt securities	—		5,290		—		5,290
Corporate debt securities	—		35,424		—		35,424
Short-term investments:
Time deposits	—		100,000		—		100,000
U.S. government and agency debt	193,703		—		—		193,703
Foreign government and agency debt	—		1,796		—		1,796
Municipal debt securities	—		1,314		—		1,314
Corporate debt securities	—		386,482		—		386,482
Asset backed securities	—		28,758		—		28,758
Other non-current assets:
Severance pay fund	—		868		—		868
Total assets	$	535,712	$	569,317	$	—	$	1,105,029



	Fair Value Measurements at February 3, 2018
	Level 1		Level 2		Level 3		Total
Items measured at fair value on a recurring basis:
Assets
Cash equivalents:
Money market funds	$	18,503	$	—	$	—	$	18,503
Time deposits	—		65,117		—		65,117
U.S. government and agency debt	51,589		—		—		51,589
Municipal debt securities	—		5,290		—		5,290
Corporate debt securities	—		127,076		—		127,076
Short-term investments:
Time deposits	—		150,000		—		150,000
U.S. government and agency debt	247,741		—		—		247,741
Foreign government and agency debt	—		6,987		—		6,987
Municipal debt securities	—		2,728		—		2,728
Corporate debt securities	—		503,079		—		503,079
Asset backed securities	—		42,255		—		42,255
Other non-current assets:
Severance pay fund	—		896		—		896
Total assets	$	317,833	$	903,428	$	—	$	1,221,261

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	May 05, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Purchase Commitments Under the Company’s manufacturing relationships with its foundry partners, cancellation of outstanding purchase orders is allowed but requires payment of all costs and expenses incurred through the date of cancellation. As of May 5, 2018, these foundries had incurred approximately $150.3 million of manufacturing costs and expenses relating to the Company’s outstanding purchase orders. Intellectual Property Indemnification The Company has agreed to indemnify certain customers for claims made against the Company’s products where such claims allege infringement of third-party intellectual property rights, including, but not limited to, patents, registered trademarks and/or copyrights. Under the aforementioned indemnification clauses, the Company may be obligated to defend the customer and pay for the damages awarded against the customer under an infringement claim, as well as the customer's attorneys’ fees and costs. The Company’s indemnification obligations generally do not expire after termination or expiration of the agreement containing the indemnification obligation. However, there are limits on and exceptions to the Company’s potential liability for indemnification. Although historically the Company has not made significant payments under these indemnification obligations, the Company cannot estimate the amount of potential future payments, if any, that it might be required to make as a result of these agreements. The maximum potential amount of any future payments that the Company could be required to make under these indemnification obligations could be significant. Contingencies and Legal Proceedings The Company and certain of its subsidiaries are engaged in legal proceedings and claims which arise in the ordinary course of its business. The Company is currently unable to predict the final outcome of these matters and, therefore, cannot determine the likelihood of loss or estimate a range of possible loss, except with respect to amounts where it has determined a loss is both probable and estimable and where it has made an accrual. Litigation is subject to inherent uncertainties and unfavorable rulings could occur. An unfavorable ruling in litigation, particularly patent litigation, could require the Company to pay damages, one-time license fees or ongoing royalty payments, and could prevent the Company from manufacturing or selling some of its products or limit or restrict the type of work that employees involved in such litigation may perform for the Company, any of which could adversely affect financial results in future periods. There can be no assurance that these matters will be resolved in a manner that is not adverse to the Company’s business, financial condition, results of operations or cash flows. For additional discussion regarding certain risks related to litigation matters, please see Part II, Item 1A, "Risk Factors." Indemnities, Commitments and Guarantees During its normal course of business, the Company has made certain indemnities, commitments and guarantees under which it may be required to make payments in relation to certain transactions. These indemnities may include intellectual property indemnities to the Company’s customers in connection with the sales of its products, indemnities for liabilities associated with the infringement of other parties’ technology based upon the Company’s products, indemnities for general commercial obligations, indemnities to various lessors in connection with facility leases for certain claims arising from such facility or lease, and indemnities to directors and officers of the Company to the maximum extent permitted under the laws of Bermuda. In addition, the Company has contractual commitments to various customers that could require the Company to incur costs to repair an epidemic defect with respect to its products outside of the normal warranty period if such defect were to occur. The duration of these indemnities, commitments and guarantees varies and, in certain cases, is indefinite. Some of these indemnities, commitments and guarantees do not provide for any limitation of the maximum potential future payments that the Company could be obligated to make. In general, the Company does not record any liability for these indemnities, commitments and guarantees in the accompanying consolidated balance sheets as the amounts cannot be reasonably estimated and are not considered probable. The Company does, however, accrue for losses for any known contingent liability, including those that may arise from indemnification provisions, when the loss is both estimable and probable.

Income Tax	3 Months Ended
Income Tax	May 05, 2018
Income Tax Disclosure [Abstract]
Income Tax	Income Tax The Company’s tax provision for interim periods is determined using an estimate of its annual effective tax rate, adjusted for discrete items, if any, that arise during the period. Each quarter, the Company updates its estimate of the annual effective tax rate, and if the estimated annual effective tax rate changes, the Company makes a cumulative adjustment in such period. The Company’s quarterly tax provision, and estimate of its annual effective tax rate, is subject to variation due to several factors, including variability in pre-tax income (or loss) and the mix of jurisdictions to which they relate, changes in how the Company does business, and tax law developments. The Company’s estimated effective tax rate for the year differs from the U.S. statutory rate primarily due to the benefit of a substantial portion of its earnings being taxed at rates lower than the U.S. statutory rate. The income tax provision for the three months ended May 5, 2018 included the current income tax expense of $3.0 million, a net increase in unrecognized tax benefits of $0.3 million, and an expense of $0.4 million related to other discrete items recorded in the quarter. The net increase in unrecognized tax benefits arose from penalties and interest of $0.5 million accrued on the outstanding unrecognized tax benefit balance, partially offset by the release of $0.2 million due to expiration of the statute of limitations in certain non-U.S. jurisdictions. The income tax provision for the three months ended April 29, 2017 included the current income tax expense of $3.5 million, a net increase in unrecognized tax benefits of $1.0 million, and an expense of $0.7 million related to other discrete items recorded in the quarter. The net increase in unrecognized tax benefits arose from penalties and interest of $0.7 million accrued on the outstanding unrecognized tax benefit balance, plus the accrual of $0.6 million for changes in prior year tax positions, partially offset by the release of $0.3 million due to expiration of the statute of limitations in certain non-U.S. jurisdictions. It is reasonably possible that the amount of unrecognized tax benefits could increase or decrease significantly due to changes in tax law in various jurisdictions, new tax audits and changes in the U.S. dollar as compared to foreign currencies within the next 12 months. Excluding these factors, uncertain tax positions may decrease by as much as $11.9 million from the lapse of statutes of limitation in various jurisdictions during the next twelve months. Government tax authorities from several non-U.S. jurisdictions are also examining the Company’s tax returns. The Company believes that it has adequately provided for any reasonably foreseeable outcomes related to its tax audits and that any settlement will not have a material effect on its results at this time. The Company operates under tax incentives in certain countries, which may be extended if certain additional requirements are satisfied. The tax incentives are conditional upon meeting certain employment and investment thresholds. The impact of these tax incentives decreased foreign taxes by $0.7 million and $0.7 million for the three months ended May 5, 2018 and April 29, 2017, respectively. The benefit of the tax incentives on net income per share was less than $0.01 per share for the three months ended May 5, 2018 and April 29, 2017. The Tax Cuts and Jobs Act ("2017 Tax Act") was signed into law on December 22, 2017. The 2017 Tax Act significantly revises the U.S. corporate income tax by, among other things, lowering the statutory corporate tax rate from 35% to 21%, eliminating certain deductions, imposing a mandatory one-time tax on accumulated earnings of foreign subsidiaries, introducing new tax regimes, and changing how foreign earnings are subject to U.S. tax. The 2017 Tax Act also enhanced and extended through 2026 the option to claim accelerated depreciation deductions on qualified property. The Company has not completed its determination of the accounting implications of the 2017 Tax Act on its tax accruals. However, the Company reasonably estimated the effects of the 2017 Tax Act and recorded provisional amounts in its financial statements as of February 3, 2018. There were no additional adjustments made to these amounts in the quarter ended May 5, 2018. As the Company continues its analysis of the 2017 Tax Act, collects and prepares necessary data, and interprets any additional guidance issued by the U.S. Treasury Department, the IRS, and other standard-setting bodies, the Company may make adjustments to the provisional amounts. Those adjustments may materially impact the Company's provision for income taxes in the period in which the adjustments are made. The Company’s principal source of liquidity as of May 5, 2018 consisted of approximately $1.9 billion of cash, cash equivalents and short-term investments, of which approximately $1.0 billion was held by foreign subsidiaries (outside Bermuda). Approximately $550 million of this amount held by foreign subsidiaries is related to subsidiaries whose earnings are undistributed and have been indefinitely reinvested outside of Bermuda. These funds are primarily held in China, Israel and the United States. The Company plans to use such amounts to fund various activities outside of Bermuda, including working capital requirements, capital expenditures for expansion, funding of future acquisitions or other financing activities. The amount of undistributed earnings of these subsidiaries for which no deferred tax liability has been provided is $430 million. If such funds were needed by the parent company in Bermuda or if the amounts were otherwise no longer considered indefinitely reinvested, the Company would incur a tax expense of approximately $160 million.

Net Income Per Share

3 Months Ended

May 05, 2018

Earnings Per Share [Abstract]

Net Income Per Share

The Company reports both basic net income per share, which is based on the weighted average number of common shares outstanding during the period, and diluted net income per share, which is based on the weighted average number of common shares outstanding and potentially dilutive shares outstanding during the period. The computations of basic and diluted net income per share are presented in the following table (in thousands, except per share amounts):



	Three Months Ended
	May 5, 2018		April 29, 2017
Numerator:
Income from continuing operations, net of tax	$	128,612	$	99,592
Income from discontinued operations, net of tax	—		7,029
Net income	$	128,612	$	106,621
Denominator:
Weighted average shares — basic	497,335		503,790
Effect of dilutive securities:
Share-based awards	11,381		13,802
Weighted average shares — diluted	508,716		517,592
Income from continuing operations per share:
Basic	$	0.26	$	0.20
Diluted	$	0.25	$	0.20
Income from discontinued operations per share:
Basic	$	—	$	0.01
Diluted	$	—	$	0.01
Net income per share:
Basic	$	0.26	$	0.21
Diluted	$	0.25	$	0.21

Potential dilutive securities include dilutive common shares from share-based awards attributable to the assumed exercise of stock options, restricted stock units and employee stock purchase plan shares using the treasury stock method. Under the treasury stock method, potential common shares outstanding are not included in the computation of diluted net income per share if their effect is anti-dilutive.

The amount of anti-dilutive potential shares from share-based awards was 5.2 million weighted average shares outstanding and 9.2 million weighted average shares outstanding for the three months ended May 5, 2018 and April 29, 2017, respectively.

Anti-dilutive potential shares from share-based awards are excluded from the calculation of diluted earnings per share for all periods reported above because either their exercise price exceeded the average market price during the period or the share-based awards were determined to be anti-dilutive based on applying the treasury stock method.

Basis of Presentation (Policies)	3 Months Ended
Basis of Presentation (Policies)	May 05, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Fiscal Period	The Company’s fiscal year is the 52- or 53-week period ending on the Saturday closest to January 31. Accordingly, every fifth or sixth fiscal year will have a 53-week period. The additional week in a 53-week year is added to the fourth quarter, making such quarter consist of 14 weeks. Fiscal 2018 had a 53-week year. Fiscal 2019 is a 52-week year.
Accounting Pronouncements Recently Adopted and Accounting Pronouncements Not Yet Effective	Accounting Pronouncements Recently Adopted In May 2014, the FASB issued a new accounting standard on the recognition of revenue from contracts with customers that superseded nearly all existing revenue recognition guidance under GAAP. The new standard requires an entity to recognize revenue from the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The guidance addresses, in particular, contracts with more than one performance obligation, as well as the accounting for certain costs to obtain or fulfill a contract with a customer, and provides for additional disclosures with respect to revenue and cash flows arising from contracts with customers. Public entities are required to apply the amendments on either a full or modified retrospective basis for annual periods beginning after December 15, 2017 and for interim periods within those annual periods. The Company adopted the standard on a modified retrospective basis in the first quarter of fiscal year 2019, with the cumulative effect recognized in retained earnings at the date of adoption. See "Note 3 - Revenue" for additional information on the impact of the adoption of the new standard on the Company’s consolidated financial statements. In January 2016, the FASB issued an accounting standard update that changes the accounting for equity investments, financial liabilities under the fair value option, and the presentation and disclosure requirements for financial instruments. The Company adopted the standard in the first quarter of fiscal 2019. The adoption of this guidance did not have a significant impact on the Company's consolidated financial statements. In August 2016, the FASB issued an accounting standards update to add or clarify guidance on the classification of certain cash receipts and cash payments in the statement of cash flows. The amendments in the update provide guidance on eight specific cash flow issues. The amendments to the guidance should be applied using a retrospective transition method for each period presented and, if it is impracticable to apply all of the amendments retrospectively for some of the issues, the amendments for those issues would be applied prospectively as of the earliest date practicable. The Company adopted the standard in the first quarter of fiscal 2019. The adoption of this guidance did not have an impact on the Company's consolidated financial statements. In October 2016, the FASB issued new guidance that simplifies the accounting for the income tax effects of intra-entity transfers and will require companies to recognize the income tax effects of intra-entity transfers of assets other than inventory when the transfer occurs. Previous guidance required companies to defer the income tax effects of intra-entity transfers of assets until the asset had been sold to an outside party or otherwise recognized. The Company adopted the standard in the first quarter of fiscal 2019. The adoption of this guidance did not have an impact on the Company's consolidated financial statements. In November 2016, the FASB issued new guidance that requires entities to include in their cash and cash-equivalent balances in the statement of cash flows those amounts that are deemed to be restricted cash and restricted cash equivalents. As a result, companies will no longer present transfers between cash and cash equivalents and restricted cash and restricted cash equivalents in the statement of cash flows. The Company adopted the standard in the first quarter of fiscal 2019. The adoption of this guidance did not have a significant impact on the Company's consolidated financial statements. In January 2017, the FASB issued an accounting standards update that revises the definition of a business. The amendments provide a more robust framework for determining when a set of assets and activities is a business. The update is intended to help companies evaluate whether transactions should be accounted for as acquisitions or disposals of assets or businesses. The Company adopted the standard in the first quarter of fiscal 2019. The adoption of this guidance did not have an impact on the Company's consolidated financial statements. In May 2017, the FASB issued an accounting standards update that provides guidance about which changes to the terms or conditions of a share-based payment award require an entity to apply modification accounting. Unless the changes in terms or conditions meet all three criteria outlined in the guidance, modification accounting should be applied. The three criteria relate to changes in the terms and conditions that affect the fair value, vesting conditions, or classification of a share-based payment award. The guidance is required to be applied prospectively to an award modified on or after the adoption date. The Company adopted the standard in the first quarter of fiscal 2019. The adoption of this guidance did not have an impact on the Company's consolidated financial statements. Accounting Pronouncements Not Yet Effective In February 2016, the FASB issued a new standard on the accounting for leases, which requires a lessee to record a right-of-use asset and a corresponding lease liability on the balance sheet for all leases with terms longer than twelve months. The standard also expands the required quantitative and qualitative disclosures for lease arrangements. The standard is effective for the Company beginning in the first quarter of fiscal year 2020. The Company is currently evaluating the effect this new guidance will have on its consolidated financial statements. In June 2016, the FASB issued a new standard requiring financial assets measured at amortized cost be presented at the net amount expected to be collected, through an allowance for credit losses that is deducted from the amortized cost basis. The standard eliminates the threshold for initial recognition in current GAAP and reflects an entity’s current estimate of all expected credit losses. The measurement of expected credit losses is based on historical experience, current conditions, and reasonable and supportable forecasts that affect the collectability of the financial assets. The standard is effective for the Company beginning in the first quarter of fiscal year 2021. The Company does not expect the adoption of this guidance will have a material effect on its consolidated financial statements. In August 2017, the FASB issued an accounting standards update that simplifies the application and administration of hedge accounting. The guidance amends the presentation and disclosure requirements and changes how companies assess effectiveness. The guidance is intended to more closely align hedge accounting with companies' risk management strategies, simplify the application of hedge accounting, and increase transparency as to the scope and results of hedging programs. The guidance is effective for the Company beginning in the first quarter of fiscal year 2021. Early adoption is permitted. The guidance will be applied to cash flow and net investment hedge relationships that exist on the date of adoption using a modified retrospective approach. The presentation and disclosure requirements will be applied prospectively. The Company is evaluating the effect this new guidance will have on its consolidated financial statements.

Revenue (Tables)

3 Months Ended

May 05, 2018

Revenue from Contract with Customer [Abstract]

Summary of Impact of Adoption of New Revenue Standard



	May 5, 2018
(In thousands)	As currently reported		Adjustments			Balances without adoption of new revenue standard
Consolidated balance sheet:
Assets
Accounts receivable, net	$	329,650	$	(5,837	)	$	323,813
Inventory	169,556		(2,486		)	167,070
Other non-current assets	209,261		(58,717		)	150,544
Liabilities and shareholders' equity:
Accrued liabilities	180,117		(97,983		)	82,134
Deferred income	1,880		77,368			79,248
Retained earnings	$	1,542,437	$	(46,425	)	$	1,496,012



	Three Months Ended May 5, 2018
(In thousands, except per share amounts)	As currently reported		Adjustments			Balances without adoption of new revenue standard
Consolidated statement of operation:
Net revenue	$	604,631	$	(15,529	)	$	589,102
Cost of goods sold	228,938		(3,396		)	225,542
Net income (loss)	128,612		(12,133		)	116,479
Net income (loss) per share - Basic	0.26		(0.03		)	0.23
Net income (loss) per share - Diluted	$	0.25	$	(0.02	)	$	0.23

Disaggregation of Revenue

The following table summarizes net revenue disaggregated by product group (in thousands, except percentages):



	Three Months Ended
		May 5, 2018		% of Total
Net revenue by product group:
Storage (1)		$	317,069	52	%
Networking (2)		153,734		26	%
Connectivity (3)		90,494		15	%
Other (4)		43,334		7	%
		$	604,631


1)	Storage products are comprised primarily of HDD, SSD Controllers and Data Center Storage Solutions.


2)	Networking products are comprised primarily of Ethernet Switches, Ethernet Transceivers, Embedded ARM Processors and Automotive Ethernet, as well as a few legacy product lines in which the Company no longer invests, but will generate revenue for several years.


3)	Connectivity products are comprised primarily of Wi-Fi solutions including Wi-Fi only, Wi-Fi/Bluetooth combos and Wi-Fi Microcontroller combos.


4)	Other products comprised of printer specific standard SoC products, as well as full-custom, application-specific integrated circuits and application processors.

The following table summarizes net revenue disaggregated by primary geographical market (in thousands, except percentages):



	Three Months Ended
		May 5, 2018		% of Total
Net revenue based on destination of shipment:
China		$	276,622	46	%
Malaysia		90,623		15	%
Philippines		57,767		9	%
Thailand		41,534		7	%
United States		16,030		3	%
Other		122,055		20	%
		$	604,631

The following table summarizes net revenue disaggregated by customer type (in thousands, except percentages):



	Three Months Ended
		May 5, 2018		% of Total
Net revenue by customer type:
Direct customers		$	470,476	78	%
Distributors		134,155		22	%
		$	604,631

Supplemental Financial Information (Tables)

3 Months Ended

May 05, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Inventories



	May 5, 2018		February 3, 2018
Inventories:
Work-in-process	$	104,792	$	103,711
Finished goods	64,764		66,328
Total inventories	$	169,556	$	170,039

Schedule of Property and Equipment, Net



	May 5, 2018			February 3, 2018
Property and equipment, net:
Machinery and equipment	$	550,785		$	535,416
Land, buildings, and leasehold improvements	251,555			247,675
Computer software	98,477			98,253
Furniture and fixtures	21,134			21,139
	921,951			902,483
Less: Accumulated depreciation and amortization	(708,295		)	(700,261		)
Total property and equipment, net	$	213,656		$	202,222

Schedule of Accrued Liabilities

Current accrued liabilities are comprised of the following at May 5, 2018 and February 3, 2018, respectively:



	May 5, 2018		February 3, 2018
Accrued liabilities:
Contract liabilities	$	104,988	$	—
Technology license obligations	33,167		28,488
Accrued royalties	13,028		11,860
Accrued rebates (1)	—		9,292
Accrued legal related expenses	9,354		13,050
Unsettled investment trades (2)	1,499		4,497
Other	18,081		19,771
Total accrued liabilities	$	180,117	$	86,958

(1) Accrued rebates are classified as part of contract liabilities beginning in fiscal year 2019 upon adoption of the new revenue recognition standard.

(2) Unsettled investment trades represent amounts owed to third parties for investment purchases for which cash settlement has not yet occurred.

Schedule of Deferred Income



	May 5, 2018			February 3, 2018
Deferred income:
Deferred revenue	$	2,407		$	81,896
Deferred cost of goods sold	(527		)	(20,659		)
Deferred income	$	1,880		$	61,237

Schedule of Other Non-current Liabilities



	May 5, 2018		February 3, 2018
Other non-current liabilities:
Deferred tax liabilities	$	52,292	$	52,204
Technology license obligations	20,789		34,060
Other	4,480		2,492
Other non-current liabilities	$	77,561	$	88,756

Changes in Accumulated Other Comprehensive Income (Loss) by Components

The changes in accumulated other comprehensive income (loss) by components are presented in the following tables:



	Unrealized Gain (Loss) on Marketable Securities (1)
Balance at February 3, 2018	$	(2,322	)
Other comprehensive loss before reclassifications	(733		)
Amounts reclassified from accumulated other comprehensive loss	651
Net current-period other comprehensive loss, net of tax	(82		)
Balance at May 5, 2018	$	(2,404	)



	Unrealized Gain (Loss) on Marketable Securities (1)			Unrealized Gain (Loss) on Cash Flow Hedges (2)			Net Change in Pension Liability			Total
Balance at January 28, 2017	$	(801	)	$	824		$	—		$	23
Other comprehensive income (loss) before reclassifications	(714		)	1,838			(1,272		)	(148		)
Amounts reclassified from accumulated other comprehensive income (loss)	41			(80		)	—			(39		)
Net current-period other comprehensive income (loss), net of tax	(673		)	1,758			(1,272		)	(187		)
Balance at April 29, 2017	$	(1,474	)	$	2,582		$	(1,272	)	$	(164	)

(1) The amounts of gains (losses) associated with the Company's marketable securities reclassified from accumulated other comprehensive income (loss) are recorded in interest and other income, net.

Schedule of Interest and Other Income, Net



	Three Months Ended
	May 5, 2018			April 29, 2017
Interest and other income, net:
Interest income	$	6,069		$	3,512
Net realized gain (loss) on investments	(860		)	25
Currency remeasurement loss	(522		)	(90		)
Other income (loss)	2,853			(63		)
Interest expense	(244		)	(51		)
	$	7,296		$	3,333

Investments (Tables)

3 Months Ended

May 05, 2018

Investments, Debt and Equity Securities [Abstract]

Summary of Investments

The following tables summarize the Company’s investments (in thousands):



	May 5, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Short-term investments:
Available-for-sale:
U.S. government and agency debt	$	194,192	$	32	$	(521	)	$	193,703
Foreign government and agency debt	1,810		—		(14		)	1,796
Municipal debt securities	1,315		—		(1		)	1,314
Corporate debt securities	388,194		446		(2,158		)	386,482
Asset backed securities	28,954		—		(196		)	28,758
Held-to-maturity:
Time deposits	100,000		—		—			100,000
Total short-term investments	714,465		478		(2,890		)	712,053
Total investments	$	714,465	$	478	$	(2,890	)	$	712,053



	February 3, 2018
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
Short-term investments:
Available-for-sale:
U.S. government and agency debt	$	248,336	$	49	$	(644	)	$	247,741
Foreign government and agency debt	7,004		—		(17		)	6,987
Municipal debt securities	2,734		—		(6		)	2,728
Corporate debt securities	504,609		469		(1,999		)	503,079
Asset backed securities	42,429		3		(177		)	42,255
Held-to-maturity:
Time deposits	150,000		—		—			150,000
Total short-term investments	955,112		521		(2,843		)	952,790
Total investments	$	955,112	$	521	$	(2,843	)	$	952,790

Gross Realized Gains and Losses on Sales of Available-for-Sale Securities

Gross realized gains and gross realized losses on sales of available-for-sale securities are presented in the following tables (in thousands):



	Three Months Ended
	May 5, 2018			April 29, 2017
Gross realized gains	$	2		$	69
Gross realized losses	(862		)	(44		)
Total net realized gains (losses)	$	(860	)	$	25

Available-for-sale Securities Classified by Contractual Maturities

The contractual maturities of available-for-sale securities are presented in the following tables (in thousands):



	May 5, 2018				February 3, 2018
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Due in one year or less	$	445,026	$	444,314	$	554,247	$	553,866
Due between one and five years	269,439		267,740		400,866		398,924
Due over five years	—		—		—		—
	$	714,465	$	712,054	$	955,113	$	952,790

Unrealized Loss Position Investments



	May 5, 2018
	Less than 12 months					12 months or more					Total
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
U.S. government and agency debt	$	123,181	$	(219	)	$	45,137	$	(302	)	$	168,318	$	(521	)
Foreign government and agency debt	—		—			1,796		(13		)	1,796		(13		)
Municipal debt securities	1,314		(1		)	—		—			1,314		(1		)
Corporate debt securities	195,971		(1,660		)	39,594		(498		)	235,565		(2,158		)
Asset backed securities	26,146		(158		)	2,161		(39		)	28,307		(197		)
Total securities	$	346,612	$	(2,038	)	$	88,688	$	(852	)	$	435,300	$	(2,890	)


	February 3, 2018
	Less than 12 months					12 months or more					Total
	Fair Value		Unrealized Loss			Fair Value		Unrealized Loss			Fair Value		Unrealized Loss
U.S. government and agency debt	$	148,538	$	(298	)	$	51,332	$	(346	)	$	199,870	$	(644	)
Foreign government and agency debt	3,993		(1		)	2,994		(16		)	6,987		(17		)
Municipal debt securities	1,969		(6		)	—		—			1,969		(6		)
Corporate debt securities	253,380		(1,514		)	46,805		(485		)	300,185		(1,999		)
Asset backed securities	37,636		(145		)	2,167		(32		)	39,803		(177		)
Total securities	$	445,516	$	(1,964	)	$	103,298	$	(879	)	$	548,814	$	(2,843	)

Derivative Financial Instruments (Tables)

3 Months Ended

May 05, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Information about Gains (Losses) Associated with Derivative Financial Instruments

The following table provides information about gains (losses) associated with the Company’s derivative financial instruments (in thousands):



		Amount of Gains (Losses) in Statements of Operations
		Three Months Ended
	Location of Gains (Losses) in Statements of Operations	May 5, 2018		April 29, 2017
Derivatives designated as cash flow hedges:
Forward contracts:	Research and development	$	—	$	475
	Selling, general and administrative	—		63
		$	—	$	538

Gains (Losses) Reclassified from Accumulated Other Comprehensive Income (Loss)



	Three Months Ended
Affected Line Item in the Statements of Operations:	May 5, 2018		April 29, 2017
Operating costs and expenses:
Cash flow hedges:
Research and development	$	—	$	71
Selling, general and administrative	—		9
Total	$	—	$	80

Fair Value Measurements (Tables)

3 Months Ended

May 05, 2018

Fair Value Disclosures [Abstract]

Fair Value, Assets and Liabilities Measured on Recurring Basis



	Fair Value Measurements at May 5, 2018
	Level 1		Level 2		Level 3		Total
Items measured at fair value on a recurring basis:
Assets
Cash equivalents:
Money market funds	$	93,108	$	—	$	—	$	93,108
Time deposits	—		9,385		—		9,385
U.S. government and agency debt	248,901		—		—		248,901
Municipal debt securities	—		5,290		—		5,290
Corporate debt securities	—		35,424		—		35,424
Short-term investments:
Time deposits	—		100,000		—		100,000
U.S. government and agency debt	193,703		—		—		193,703
Foreign government and agency debt	—		1,796		—		1,796
Municipal debt securities	—		1,314		—		1,314
Corporate debt securities	—		386,482		—		386,482
Asset backed securities	—		28,758		—		28,758
Other non-current assets:
Severance pay fund	—		868		—		868
Total assets	$	535,712	$	569,317	$	—	$	1,105,029



	Fair Value Measurements at February 3, 2018
	Level 1		Level 2		Level 3		Total
Items measured at fair value on a recurring basis:
Assets
Cash equivalents:
Money market funds	$	18,503	$	—	$	—	$	18,503
Time deposits	—		65,117		—		65,117
U.S. government and agency debt	51,589		—		—		51,589
Municipal debt securities	—		5,290		—		5,290
Corporate debt securities	—		127,076		—		127,076
Short-term investments:
Time deposits	—		150,000		—		150,000
U.S. government and agency debt	247,741		—		—		247,741
Foreign government and agency debt	—		6,987		—		6,987
Municipal debt securities	—		2,728		—		2,728
Corporate debt securities	—		503,079		—		503,079
Asset backed securities	—		42,255		—		42,255
Other non-current assets:
Severance pay fund	—		896		—		896
Total assets	$	317,833	$	903,428	$	—	$	1,221,261

Net Income Per Share (Tables)

3 Months Ended

May 05, 2018

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The computations of basic and diluted net income per share are presented in the following table (in thousands, except per share amounts):



	Three Months Ended
	May 5, 2018		April 29, 2017
Numerator:
Income from continuing operations, net of tax	$	128,612	$	99,592
Income from discontinued operations, net of tax	—		7,029
Net income	$	128,612	$	106,621
Denominator:
Weighted average shares — basic	497,335		503,790
Effect of dilutive securities:
Share-based awards	11,381		13,802
Weighted average shares — diluted	508,716		517,592
Income from continuing operations per share:
Basic	$	0.26	$	0.20
Diluted	$	0.25	$	0.20
Income from discontinued operations per share:
Basic	$	—	$	0.01
Diluted	$	—	$	0.01
Net income per share:
Basic	$	0.26	$	0.21
Diluted	$	0.25	$	0.21

Basis of Presentation (Details) - USD ($)	7 Months Ended
Basis of Presentation (Details) - USD ($)	Jun. 30, 2018	May 05, 2018
Business Acquisition [Line Items]
Deferred debt and equity financing costs		$ 20,100,000
Scenario, Forecast \| Line of Credit \| Revolving Credit Facility
Business Acquisition [Line Items]
Maximum borrowing capacity	$ 500,000,000
Cavium \| Scenario, Forecast
Business Acquisition [Line Items]
Number of common shares per Cavium share	2.1757
Cash consideration (in usd per share)	$ 40.00
Purchase price (in usd per share)	$ 80
Transaction value	$ 6,000,000,000
Amount of debt financing	1,750,000,000
Termination fee	180,000,000
Cavium \| Scenario, Forecast \| Goldman Sachs Bank USA
Business Acquisition [Line Items]
Commitments of debt financing	850,000,000
Cavium \| Scenario, Forecast \| Bank of America Merrill Lynch
Business Acquisition [Line Items]
Commitments of debt financing	$ 900,000,000

Revenue - Impacts from the Adoption of the New Revenue Standard, Additional Information (Details) - USD ($) $ in Thousands	May 05, 2018	Feb. 03, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings	$ 1,542,437	$ 1,409,452
Accounting Standards Update 2014-09 \| Difference between Revenue Guidance in Effect before and after Topic 606
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings	$ (46,425)	$ 34,200

Revenue - Summary of Impact of Adoption of New Revenue Standard (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	May 05, 2018	Apr. 29, 2017	Feb. 03, 2018
Assets
Accounts receivable, net	$ 329,650		$ 280,395
Inventory	169,556		170,039
Other non-current assets	209,261		148,800
Liabilities and shareholders' equity:
Accrued liabilities	180,117		86,958
Deferred income	1,880		61,237
Retained earnings	1,542,437		1,409,452
Consolidated statement of operation:
Net revenue	604,631	$ 572,709
Cost of goods sold	228,938	227,198
Net income (loss)	$ 128,612	$ 106,621
Net income (loss) per share - Basic (in usd per share)	$ 0.26	$ 0.21
Net income (loss) per share - Diluted (in usd per share)	$ 0.25	$ 0.21
Adjustments \| Accounting Standards Update 2014-09
Assets
Accounts receivable, net	$ (5,837)
Inventory	(2,486)
Other non-current assets	(58,717)
Liabilities and shareholders' equity:
Accrued liabilities	(97,983)
Deferred income	77,368
Retained earnings	(46,425)		$ 34,200
Consolidated statement of operation:
Net revenue	(15,529)
Cost of goods sold	(3,396)
Net income (loss)	$ (12,133)
Net income (loss) per share - Basic (in usd per share)	$ (0.03)
Net income (loss) per share - Diluted (in usd per share)	$ (0.02)
Balances without adoption of new revenue standard
Assets
Accounts receivable, net	$ 323,813
Inventory	167,070
Other non-current assets	150,544
Liabilities and shareholders' equity:
Accrued liabilities	82,134
Deferred income	79,248
Retained earnings	1,496,012
Consolidated statement of operation:
Net revenue	589,102
Cost of goods sold	225,542
Net income (loss)	$ 116,479
Net income (loss) per share - Basic (in usd per share)	$ 0.23
Net income (loss) per share - Diluted (in usd per share)	$ 0.23

Revenue - Net Revenue by Product Group (Details) $ in Thousands	3 Months Ended
	May 05, 2018 USD ($)
Disaggregation of Revenue [Line Items]
Net revenue	$ 604,631
Storage
Disaggregation of Revenue [Line Items]
Net revenue	$ 317,069
Storage \| Net revenue
Disaggregation of Revenue [Line Items]
% of Total	52.00%
Networking
Disaggregation of Revenue [Line Items]
Net revenue	$ 153,734
Networking \| Net revenue
Disaggregation of Revenue [Line Items]
% of Total	26.00%
Connectivity
Disaggregation of Revenue [Line Items]
Net revenue	$ 90,494
Connectivity \| Net revenue
Disaggregation of Revenue [Line Items]
% of Total	15.00%
Other
Disaggregation of Revenue [Line Items]
Net revenue	$ 43,334
Other \| Net revenue
Disaggregation of Revenue [Line Items]
% of Total	7.00%

Revenue - Net Revenue Based on Destination of Shipment (Details) $ in Thousands	3 Months Ended
	May 05, 2018 USD ($)
Disaggregation of Revenue [Line Items]
Net revenue	$ 604,631
China
Disaggregation of Revenue [Line Items]
Net revenue	$ 276,622
China \| Net revenue
Disaggregation of Revenue [Line Items]
% of Total	46.00%
Malaysia
Disaggregation of Revenue [Line Items]
Net revenue	$ 90,623
Malaysia \| Net revenue
Disaggregation of Revenue [Line Items]
% of Total	15.00%
Philippines
Disaggregation of Revenue [Line Items]
Net revenue	$ 57,767
Philippines \| Net revenue
Disaggregation of Revenue [Line Items]
% of Total	9.00%
Thailand
Disaggregation of Revenue [Line Items]
Net revenue	$ 41,534
Thailand \| Net revenue
Disaggregation of Revenue [Line Items]
% of Total	7.00%
United States
Disaggregation of Revenue [Line Items]
Net revenue	$ 16,030
United States \| Net revenue
Disaggregation of Revenue [Line Items]
% of Total	3.00%
Other
Disaggregation of Revenue [Line Items]
Net revenue	$ 122,055
Other \| Net revenue
Disaggregation of Revenue [Line Items]
% of Total	20.00%

Revenue - Net Revenue by Customer Type (Details) $ in Thousands	3 Months Ended
	May 05, 2018 USD ($)
Disaggregation of Revenue [Line Items]
Net revenue	$ 604,631
Direct customers
Disaggregation of Revenue [Line Items]
Net revenue	$ 470,476
Direct customers \| Net revenue
Disaggregation of Revenue [Line Items]
% of Total	78.00%
Distributors
Disaggregation of Revenue [Line Items]
Net revenue	$ 134,155
Distributors \| Net revenue
Disaggregation of Revenue [Line Items]
% of Total	22.00%

Revenue - Contract Liabilities (Details) $ in Millions	3 Months Ended
Revenue - Contract Liabilities (Details) $ in Millions	May 05, 2018 USD ($)
Change in Contract with Customer, Asset and Liability [Abstract]
Beginning balance	$ 79.6
Estimates for additional shipments	198.8
Credit memos issued	173.4
Ending balance	$ 105.0

Supplemental Financial Information - Inventories (Details) - USD ($) $ in Thousands	May 05, 2018	Feb. 03, 2018
Inventories:
Work-in-process	$ 104,792	$ 103,711
Finished goods	64,764	66,328
Total inventories	169,556	170,039
Third-party Logistics Providers
Inventories:
Total inventories	$ 16,300	$ 18,700

Supplemental Financial Information - Property and Equipment, Net (Details) - USD ($) $ in Thousands	May 05, 2018	Feb. 03, 2018
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 921,951	$ 902,483
Less: Accumulated depreciation and amortization	(708,295)	(700,261)
Total property and equipment, net	213,656	202,222
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	550,785	535,416
Land, buildings, and leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	251,555	247,675
Computer software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	98,477	98,253
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 21,134	$ 21,139

Supplemental Financial Information - Accrued Liabilities (Details) - USD ($) $ in Thousands	May 05, 2018	Feb. 03, 2018
Accrued liabilities:
Contract liabilities	$ 104,988	$ 0
Technology license obligations	33,167	28,488
Accrued royalties	13,028	11,860
Accrued rebates	0	9,292
Accrued legal related expenses	9,354	13,050
Unsettled investment trades	1,499	4,497
Other	18,081	19,771
Total accrued liabilities	$ 180,117	$ 86,958

Supplemental Financial Information - Deferred Income (Details) - USD ($) $ in Thousands	May 05, 2018	Feb. 03, 2018
Deferred income:
Deferred revenue	$ 2,407	$ 81,896
Deferred cost of goods sold	(527)	(20,659)
Deferred income	$ 1,880	$ 61,237

- Definition

The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

+ References + Details

Supplemental Financial Information - Other Non-current Liabilities (Details) - USD ($) $ in Thousands	May 05, 2018	Feb. 03, 2018
Other non-current liabilities:
Deferred tax liabilities	$ 52,292	$ 52,204
Technology license obligations	20,789	34,060
Other	4,480	2,492
Other non-current liabilities	$ 77,561	$ 88,756

Supplemental Financial Information - Changes in Accumulated Other Comprehensive Income (Loss) by Components (Details) - USD ($) $ in Thousands	3 Months Ended
	May 05, 2018	Apr. 29, 2017
Increase (Decrease) in AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 4,141,413
Other comprehensive income (loss) before reclassifications		$ (148)
Amounts reclassified from accumulated other comprehensive income (loss)		(39)
Other comprehensive loss, net of tax	(82)	(187)
Ending balance	4,285,511
Unrealized Gain (Loss) on Marketable Securities
Increase (Decrease) in AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(2,322)	(801)
Other comprehensive income (loss) before reclassifications	(733)	(714)
Amounts reclassified from accumulated other comprehensive income (loss)	651	41
Other comprehensive loss, net of tax	(82)	(673)
Ending balance	$ (2,404)	(1,474)
Unrealized Gain (Loss) on Cash Flow Hedges
Increase (Decrease) in AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		824
Other comprehensive income (loss) before reclassifications		1,838
Amounts reclassified from accumulated other comprehensive income (loss)		(80)
Other comprehensive loss, net of tax		1,758
Ending balance		2,582
Net Change in Pension Liability
Increase (Decrease) in AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		0
Other comprehensive income (loss) before reclassifications		(1,272)
Amounts reclassified from accumulated other comprehensive income (loss)		0
Other comprehensive loss, net of tax		(1,272)
Ending balance		(1,272)
Total
Increase (Decrease) in AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance		23
Ending balance		$ (164)

Supplemental Financial Information - Interest and Other Income, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	May 05, 2018	Apr. 29, 2017
Interest and other income, net:
Interest income	$ 6,069	$ 3,512
Net realized gain (loss) on investments	(860)	25
Currency remeasurement loss	(522)	(90)
Other income (loss)	2,853	(63)
Interest expense	(244)	(51)
Interest and other income, net	$ 7,296	$ 3,333

- Definition

This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting and losses recognized for other than temporary impairments (OTTI) of the subject investments.

+ References + Details

Investments - Summary of Investments (Details) - USD ($) $ in Thousands	May 05, 2018	Feb. 03, 2018
Available-for-sale:
Amortized Cost	$ 714,465	$ 955,113
Estimated Fair Value	712,054	952,790
Held-to-maturity:
Amortized Cost	714,465	955,112
Gross Unrealized Gains	478	521
Gross Unrealized Losses	(2,890)	(2,843)
Estimated Fair Value	712,053	952,790
Short-term, highly liquid investments	392,100	267,600
Total short-term investments
Held-to-maturity:
Amortized Cost	714,465	955,112
Gross Unrealized Gains	478	521
Gross Unrealized Losses	(2,890)	(2,843)
Estimated Fair Value	712,053	952,790
U.S. government and agency debt
Available-for-sale:
Amortized Cost	194,192	248,336
Gross Unrealized Gains	32	49
Gross Unrealized Losses	(521)	(644)
Estimated Fair Value	193,703	247,741
Foreign government and agency debt
Available-for-sale:
Amortized Cost	1,810	7,004
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(14)	(17)
Estimated Fair Value	1,796	6,987
Municipal debt securities
Available-for-sale:
Amortized Cost	1,315	2,734
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1)	(6)
Estimated Fair Value	1,314	2,728
Corporate debt securities
Available-for-sale:
Amortized Cost	388,194	504,609
Gross Unrealized Gains	446	469
Gross Unrealized Losses	(2,158)	(1,999)
Estimated Fair Value	386,482	503,079
Asset backed securities
Available-for-sale:
Amortized Cost	28,954	42,429
Gross Unrealized Gains	0	3
Gross Unrealized Losses	(196)	(177)
Estimated Fair Value	28,758	42,255
Time deposits
Held-to-maturity:
Amortized Cost	100,000	150,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	$ 100,000	$ 150,000

Investments - Gross Realized Gains and Losses on Sales of Available-for-Sale Securities (Details) - USD ($) $ in Thousands	3 Months Ended
	May 05, 2018	Apr. 29, 2017
Investments, Debt and Equity Securities [Abstract]
Gross realized gains	$ 2	$ 69
Gross realized losses	(862)	(44)
Total net realized gains (losses)	$ (860)	$ 25

Investments - Contractual Maturities of Available for Sale Securities (Details) - USD ($) $ in Thousands	May 05, 2018	Feb. 03, 2018
Amortized Cost
Due in one year or less	$ 445,026	$ 554,247
Due between one and five years	269,439	400,866
Due over five years	0	0
Amortized Cost	714,465	955,113
Estimated Fair Value
Due in one year or less	444,314	553,866
Due between one and five years	267,740	398,924
Due over five years	0	0
Estimated Fair Value	$ 712,054	$ 952,790

Investments - Summary of Investments Gross Unrealized Losses and Fair Value (Details) - USD ($) $ in Thousands	May 05, 2018	Feb. 03, 2018
Fair Value
Less than 12 months	$ 346,612	$ 445,516
12 months or more	88,688	103,298
Total	435,300	548,814
Unrealized Loss
Less than 12 months	(2,038)	(1,964)
12 months or more	(852)	(879)
Total	(2,890)	(2,843)
U.S. government and agency debt
Fair Value
Less than 12 months	123,181	148,538
12 months or more	45,137	51,332
Total	168,318	199,870
Unrealized Loss
Less than 12 months	(219)	(298)
12 months or more	(302)	(346)
Total	(521)	(644)
Foreign government and agency debt
Fair Value
Less than 12 months	0	3,993
12 months or more	1,796	2,994
Total	1,796	6,987
Unrealized Loss
Less than 12 months	0	(1)
12 months or more	(13)	(16)
Total	(13)	(17)
Municipal debt securities
Fair Value
Less than 12 months	1,314	1,969
12 months or more	0	0
Total	1,314	1,969
Unrealized Loss
Less than 12 months	(1)	(6)
12 months or more	0	0
Total	(1)	(6)
Corporate debt securities
Fair Value
Less than 12 months	195,971	253,380
12 months or more	39,594	46,805
Total	235,565	300,185
Unrealized Loss
Less than 12 months	(1,660)	(1,514)
12 months or more	(498)	(485)
Total	(2,158)	(1,999)
Asset backed securities
Fair Value
Less than 12 months	26,146	37,636
12 months or more	2,161	2,167
Total	28,307	39,803
Unrealized Loss
Less than 12 months	(158)	(145)
12 months or more	(39)	(32)
Total	$ (197)	$ (177)

Investments - Additional Information (Details)	3 Months Ended
Investments - Additional Information (Details)	May 05, 2018 USD ($)
Investments, Debt and Equity Securities [Abstract]
Other-than-temporary impairments associated with credit losses	$ 0

Derivative Financial Instruments - Additional Information (Details) - USD ($)	3 Months Ended
	Apr. 29, 2017	May 05, 2018	Feb. 03, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative, notional amount		$ 0	$ 0
Hedge ineffectiveness from derivative financial instruments	$ 0
Cash flow hedges were terminated as a result of forecasted transactions that did not occur	$ 0

Derivative Financial Instruments - Information about Gains (Losses) Associated with Derivative Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended
	May 05, 2018	Apr. 29, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gains (Losses) in Statements of Operations	$ 0	$ 538
Cash flow hedges \| Forward contracts \| Research and development
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gains (Losses) in Statements of Operations	0	475
Cash flow hedges \| Forward contracts \| Selling, general and administrative
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gains (Losses) in Statements of Operations	$ 0	$ 63

Derivative Financial Instruments - Gains (Losses) Reclassified from Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	May 05, 2018	Apr. 29, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Research and development	$ 176,734	$ 188,096
Selling, general and administrative	72,313	55,104
Reclassification out of accumulated other comprehensive income (loss)
Derivative Instruments, Gain (Loss) [Line Items]
Operating costs and expenses	0	80
Reclassification out of accumulated other comprehensive income (loss) \| Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Research and development	0	71
Selling, general and administrative	$ 0	$ 9

Fair Value Measurements (Details) - USD ($) $ in Thousands	May 05, 2018	Feb. 03, 2018
Assets
Short-term Investments	$ 712,053	$ 952,790
Fair Value
Assets
Total assets	1,105,029	1,221,261
Fair Value \| Other non-current assets \| Severance pay fund
Assets
Other non-current assets	868	896
Fair Value \| Money market funds
Assets
Cash equivalents	93,108	18,503
Fair Value \| Time deposits
Assets
Cash equivalents	9,385	65,117
Fair Value \| Time deposits \| Short-term investments
Assets
Short-term Investments	100,000	150,000
Fair Value \| U.S. government and agency debt
Assets
Cash equivalents	248,901	51,589
Fair Value \| U.S. government and agency debt \| Short-term investments
Assets
Short-term Investments	193,703	247,741
Fair Value \| Foreign government and agency debt \| Short-term investments
Assets
Short-term Investments	1,796	6,987
Fair Value \| Municipal debt securities
Assets
Cash equivalents	5,290	5,290
Fair Value \| Municipal debt securities \| Short-term investments
Assets
Short-term Investments	1,314	2,728
Fair Value \| Corporate debt securities
Assets
Cash equivalents	35,424	127,076
Fair Value \| Corporate debt securities \| Short-term investments
Assets
Short-term Investments	386,482	503,079
Fair Value \| Asset backed securities \| Short-term investments
Assets
Short-term Investments	28,758	42,255
Fair Value \| Level 1
Assets
Total assets	535,712	317,833
Fair Value \| Level 1 \| Other non-current assets \| Severance pay fund
Assets
Other non-current assets	0	0
Fair Value \| Level 1 \| Money market funds
Assets
Cash equivalents	93,108	18,503
Fair Value \| Level 1 \| Time deposits
Assets
Cash equivalents	0	0
Fair Value \| Level 1 \| Time deposits \| Short-term investments
Assets
Short-term Investments	0	0
Fair Value \| Level 1 \| U.S. government and agency debt
Assets
Cash equivalents	248,901	51,589
Fair Value \| Level 1 \| U.S. government and agency debt \| Short-term investments
Assets
Short-term Investments	193,703	247,741
Fair Value \| Level 1 \| Foreign government and agency debt \| Short-term investments
Assets
Short-term Investments	0	0
Fair Value \| Level 1 \| Municipal debt securities
Assets
Cash equivalents	0	0
Fair Value \| Level 1 \| Municipal debt securities \| Short-term investments
Assets
Short-term Investments	0	0
Fair Value \| Level 1 \| Corporate debt securities
Assets
Cash equivalents	0	0
Fair Value \| Level 1 \| Corporate debt securities \| Short-term investments
Assets
Short-term Investments	0	0
Fair Value \| Level 1 \| Asset backed securities \| Short-term investments
Assets
Short-term Investments	0	0
Fair Value \| Level 2
Assets
Total assets	569,317	903,428
Fair Value \| Level 2 \| Other non-current assets \| Severance pay fund
Assets
Other non-current assets	868	896
Fair Value \| Level 2 \| Money market funds
Assets
Cash equivalents	0	0
Fair Value \| Level 2 \| Time deposits
Assets
Cash equivalents	9,385	65,117
Fair Value \| Level 2 \| Time deposits \| Short-term investments
Assets
Short-term Investments	100,000	150,000
Fair Value \| Level 2 \| U.S. government and agency debt
Assets
Cash equivalents	0	0
Fair Value \| Level 2 \| U.S. government and agency debt \| Short-term investments
Assets
Short-term Investments	0	0
Fair Value \| Level 2 \| Foreign government and agency debt \| Short-term investments
Assets
Short-term Investments	1,796	6,987
Fair Value \| Level 2 \| Municipal debt securities
Assets
Cash equivalents	5,290	5,290
Fair Value \| Level 2 \| Municipal debt securities \| Short-term investments
Assets
Short-term Investments	1,314	2,728
Fair Value \| Level 2 \| Corporate debt securities
Assets
Cash equivalents	35,424	127,076
Fair Value \| Level 2 \| Corporate debt securities \| Short-term investments
Assets
Short-term Investments	386,482	503,079
Fair Value \| Level 2 \| Asset backed securities \| Short-term investments
Assets
Short-term Investments	28,758	42,255
Fair Value \| Level 3
Assets
Total assets	0	0
Fair Value \| Level 3 \| Other non-current assets \| Severance pay fund
Assets
Other non-current assets	0	0
Fair Value \| Level 3 \| Money market funds
Assets
Cash equivalents	0	0
Fair Value \| Level 3 \| Time deposits
Assets
Cash equivalents	0	0
Fair Value \| Level 3 \| Time deposits \| Short-term investments
Assets
Short-term Investments	0	0
Fair Value \| Level 3 \| U.S. government and agency debt
Assets
Cash equivalents	0	0
Fair Value \| Level 3 \| U.S. government and agency debt \| Short-term investments
Assets
Short-term Investments	0	0
Fair Value \| Level 3 \| Foreign government and agency debt \| Short-term investments
Assets
Short-term Investments	0	0
Fair Value \| Level 3 \| Municipal debt securities
Assets
Cash equivalents	0	0
Fair Value \| Level 3 \| Municipal debt securities \| Short-term investments
Assets
Short-term Investments	0	0
Fair Value \| Level 3 \| Corporate debt securities
Assets
Cash equivalents	0	0
Fair Value \| Level 3 \| Corporate debt securities \| Short-term investments
Assets
Short-term Investments	0	0
Fair Value \| Level 3 \| Asset backed securities \| Short-term investments
Assets
Short-term Investments	$ 0	$ 0

Commitments and Contingencies (Details) $ in Millions	May 05, 2018 USD ($)
Manufacturing Costs and Expenses
Other Commitments [Line Items]
Outstanding purchase orders	$ 150.3

Income Tax (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	May 05, 2018	Apr. 29, 2017
Income Tax Disclosure [Abstract]
Current income tax expense	$ 3.0	$ 3.5
Unrecognized tax benefits	0.3	1.0
Expense related to other discrete items	0.4	0.7
Unrecognized tax benefit, interest and penalties accrued	0.5	0.7
Unrecognized tax benefit, release due to expiration of statute of limitations in non-U.S. jurisdictions	0.2	0.3
Unrecognized tax benefit, changes in prior year tax positions		0.6
Income Taxes [Line Items]
Cash, cash equivalents and short-term investments	1,900.0
Uncertain tax positions, decrease from the lapse of statutes of limitation in various jurisdictions during next 12 months	11.9
Tax incentives, decrease in foreign taxes	$ 0.7	$ 0.7
Tax incentives, effect on net income per share (less than) (in usd per share)	$ 0.01	$ 0.01
Undistributed earnings of foreign subsidiaries	$ 550.0
Undistributed earnings of foreign subsidiaries which no deferred tax liability has been provided	430.0
Foreign Subsidiaries
Income Taxes [Line Items]
Cash, cash equivalents and short-term investments	1,000.0
Increase in tax expense in the event of undistributed earnings needed by parent company or no longer considered indefinitely reinvested outside of Bermuda	$ 160.0

Net Income Per Share - Computations of Basic and Diluted Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	May 05, 2018	Apr. 29, 2017
Numerator:
Income from continuing operations, net of tax	$ 128,612	$ 99,592
Income from discontinued operations, net of tax	0	7,029
Net income	$ 128,612	$ 106,621
Denominator:
Weighted average shares — basic (in shares)	497,335	503,790
Effect of dilutive securities:
Share-based awards (in shares)	11,381	13,802
Weighted average shares — diluted (in shares)	508,716	517,592
Income from continuing operations per share:
Basic (in usd per share)	$ 0.26	$ 0.20
Diluted (in usd per share)	0.25	0.20
Income from discontinued operations per share:
Basic (in usd per share)	0.00	0.01
Diluted (in usd per share)	0.00	0.01
Net income per share:
Net income per share - Basic (in usd per share)	0.26	0.21
Net income per share - Diluted (in usd per share)	$ 0.25	$ 0.21

Net Income Per Share - Additional Information (Details) - shares shares in Millions	3 Months Ended
	May 05, 2018	Apr. 29, 2017
Earnings Per Share [Abstract]
Anti-dilutive potential shares	5.2	9.2